Previously working setup (~ 1 year) stopped working, Mullvad Wireguard for example

[Vogateer]

My set up had been working great for over a year, and I haven't made any changes to the docker compose file, so I'm not sure what might have changed.

docker-compose.yml:

services:
  gluetun:
    image: qmcgaw/gluetun
    container_name: gluetun
    restart: always
    cap_add:
      - NET_ADMIN
    devices:
      - /dev/net/tun:/dev/net/tun
    volumes:
      - /gluetun:/gluetun
    environment:
      TZ: America/Chicago
     # Wireguard
      VPN_SERVICE_PROVIDER: mullvad
      VPN_TYPE: wireguard
      WIREGUARD_PRIVATE_KEY: $MULLVAD_WG_PRIVATE_KEY
      WIREGUARD_ADDRESSES: 10.76.239.251/32
      SERVER_HOSTNAMES: us-dal-wg-403

First sign of trouble in the log is here:

INFO [healthcheck] program has been unhealthy for 6s: restarting VPN (healthcheck error: dialing: dial tcp4: lookup cloudflare.com: i/o timeout)

Continues with more errors after that:

ERROR [vpn] getting public IP address information: fetching information: Get "https://ipinfo.io/": context canceled
ERROR [vpn] cannot get version information: Get "https://api.github.com/repos/qdm12/gluetun/commits": context canceled
WARN [dns] cannot update filter block lists: Get "https://raw.githubusercontent.com/qdm12/files/master/malicious-hostnames.updated": dial tcp: lookup raw.githubusercontent.com on 1.1.1.1:53: read udp 10.76.239.251:48510->1.1.1.1:53: i/o timeout, Get "https://raw.githubusercontent.com/qdm12/files/master/malicious-ips.updated": dial tcp: lookup raw.githubusercontent.com on 1.1.1.1:53: read udp 10.76.239.251:48510->1.1.1.1:53: i/o timeout

I have gone through the items listed at https://github.com/qdm12/gluetun-wiki/blob/main/faq/healthcheck.md, updating the server list, and checking the other items. I've tried different mullvad servers with no luck. The VPN is working on other devices, so I'm not sure whether it would be an authentication issue. Any other ideas for what I might have missed? Just strange that it worked so well for so long only to stop working today.

[Vogateer]

I didn't change anything, but everything started working the next day when I started up the services again.